<?php
//echo abs(-7);
//echo max(1,8,4,6);
//echo min(1,8,4,6);
//echo pow(2,10);
//echo rand(90,100);
//echo ceil(4.01);
//echo floor(4.99);
//echo round(4.15);
//echo number_format("3.14",1);
//echo intval("3.9");

//if(is_null("")){
//    echo "yes";
//}else{
//    echo "no";
//}

//$a = "10.25";
echo number_format($a,2);
